Other Parts Discussed in Thread: CONTROLSUITE
Have written following code. The error says unresolved variables Please help
#include "DSP28x_project.h"
#include "dsp2834x_cputimers.h"
#include "dsp2834x_gpio.h"
#include "DSP2834x_spi.h"
void delay_loop(void);
void spi_xmit(Uint16 a);
void spi_fifo_init(void);
void spi_init(void);
void error(void);
void main(void)
{
Uint16 sdata,rdata; // send data
// received data
rdata = 0x0000;
InitSysCtrl();
InitSpiaGpio();
DINT;
InitPieCtrl();
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW;
spi_fifo_init(); // Initialize the Spi FIFO
spi_init(); // init SPI
sdata = 0x0000;
for(;;)
{
// Transmit data
spi_xmit(sdata);
// Wait until data is received
while(SpiaRegs.SPIFFRX.bit.RXFFST !=1) { }
// Check against sent data
rdata = SpiaRegs.SPIRXBUF;
if(rdata != sdata) error();
sdata++;
}
}
void delay_loop()
{
long i;
for (i = 0; i < 1000000; i++) {}
}
void error(void)
{
asm(" ESTOP0"); // Test failed!! Stop!
for (;;);
}
void spi_init()
{
SpiaRegs.SPICCR.all =0x000F; // Reset on, rising edge, 16-bit char bits
SpiaRegs.SPICTL.all =0x0006; // Enable master mode, normal phase,
// enable talk, and SPI int disabled.
SpiaRegs.SPIBRR =0x007F;
SpiaRegs.SPICCR.all =0x009F; // Relinquish SPI from Reset
SpiaRegs.SPIPRI.bit.FREE = 1; // Set so breakpoints don't disturb xmission
}
void spi_xmit(Uint16 a)
{
SpiaRegs.SPITXBUF=a;
}
void spi_fifo_init()
{
// Initialize SPI FIFO registers
SpiaRegs.SPIFFTX.all=0xE040;
SpiaRegs.SPIFFRX.all=0x204f;
SpiaRegs.SPIFFCT.all=0x0;
}
//===========================================================================
// No more.
//===========================================================================
